Revert a code change to http fetch requests that caused connections via proxies to fail.  This code effects connections from 'bk upgrade' and win32 clients that try to automatically detect network settings.
Revert a code change to http fetch requests that caused connections
via proxies to fail.  This code effects connections from 'bk upgrade'
and win32 clients that try to automatically detect network settings.

This fix restores 3.2.5 behavior, but doesn't fully fix the code.
A full fix will be written for 3.3.0.

bk: 4332d3cfY4ddOPfBl1KcSd9PrxLwiQ
bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper